HumiSeal 1B31

Product Specification

HumiSeal® 1B31 is a fast-drying, single-component acrylic conformal coating. This product excels in flexibility, fluoresces under UV light for easy inspection, and can be easily repaired. Additionally, HumiSeal® 1B31 is MIL-I-46058C qualified, IPC-CC-830, and fully compliant with the RoHS Directive 2002/95/EC.

Application of HumiSeal® 1B31

For successful application of a conformal coating, ensuring the substrate is clean is crucial. Surfaces should be free moisture, dirt, wax, grease, flux residues, and other contaminants. Any contamination beneath the coating can cause adhesion issues and may lead to assembly failures.

Dipping

To achieve a uniform film, the viscosity of HumiSeal® 1B31 may need to be reduced with HumiSeal® Thinner 503, depending on the complexity, density, and configuration of the assembly components. After determining the optimal viscosity, a controlled rate of immersion and withdrawal (5-15 cm/min) ensures even coating application. As the solvent evaporates during the process, viscosity increases and should be adjusted by adding small amounts of HumiSeal® Thinner 503. Regular checks of viscosity in the dip tank using a Zahn or Ford viscosity cup are recommended.

Spraying

HumiSeal® 1B31 can be sprayed using conventional equipment, but it should be done in a well-ventilated area to avoid inhalation of vapors and mist. To achieve a uniform spray pattern and pinhole-free film, the addition of HumiSeal® Thinner 521 or 521EU is necessary. The recommended thinning ratio of HumiSeal® 1B31 to HumiSeal® Thinner 521 or 521EU is 1:1 by volume, but adjustments may be required based on the spray equipment used and the operator's technique.

Brushing

HumiSeal® 1B31 can also be brushed with a small addition of HumiSeal® Thinner 503, although uniformity of the film will depend on the component density and the technique employed by the operator.

Storage

To maintain its quality, HumiSeal® 1B31 should be stored in tightly closed containers away excessive heat or cold. The product may be stored at temperatures between 0°C and 35°C. Before use, allow it to equilibrate for 24 hours at room temperature (18°C to 32°C).

Caution

Always follow local and national health and safety regulations when applying HumiSeal® Conformal Coatings. These coatings contain flammable solvents and should not be used near open flames or sparks. Ensure the area is well-ventilated to avoid inhaling vapors or spray, and protect your skin and eyes contact. Always consult the MSDS/SDS before use.